Magnetodynamic tundish (MD-T) for continuous casting of steel had been developed in PTIMA NASU. Such aggregate has some features in contrast to conventional tundish and provides different-in-principle modes of work of continuous casting machines (CCM). There were carried out both physical and mathematical modeling continuous casting of steel from MD-T. In comparison with traditional technology, it was shown that reducing in 3.0-3.5 times of metal static pres-sure at pouring leads to decreasing in 1.7-1.8 times the depth of penetration of high-speed and high-temperature melt stream into solidifying ingot. In this case, for keeping (or rising) of mass pouring rate and ingot’s withdrawal rate, it is necessary to provide increasing of melt volume which incomes into CCM mold. Results of researches had indicated that MD-T can decide this problem. Electromagnetic systems of such aggregate allow to forming the flat stream of melt in width of 0.5-0.8 m. Such features of MD-T allow changing cardinally the terms of ingot forming. So, there is increased the heat load onto mold, but at the same time the heat load is decreased in the secondary cooling zone. Also, it is possi-ble to eliminate application of high-expensive electromagnetic systems for melt braking in the CCM mold. This fact creates preconditions for reduction of CCM length.